Machine for making paper bags.



10.865,779. A PATENTED sEPT.1o,19o7.

. 0.HEssER.

MACHINE FOR MAKING PAPER BAGS.

APPLIUATION FILED s1:1 T 22.1a05.

a sums-SHEET 1.

No. 865,'7'79. PATENTED SEPT. 10, 1907.

` 0. HESSER.

MACHINE POR MAKINGPAPER BAGS. ArPLIoATIoN FILED snPT.z2.19o6.

a SHEETS-SHEET 2. v

PATENTEI) SEPT. l0, 1907.

O. BESSER.

MACHINE POR MAKING PAPER BAGS.

APPLICATION FILED SEPT. 22.1905.

8 SHEETS-SHEET 3.

- No. 865,779; PAPENTPD SPPP.10, 1907.

o. HPssEP. MACHINE P0P MAKING PAPER BAGS.

APPLICATION FILED SEPT. 22. 1905.

B SHEETS-SHEET 4.

PATENTED SEPT. l0, 1907.

o` EESSERl MACHINE PORA MAKING PAPER BAGS.

APPLICATION FILED SEPT. 22,1905.

8 SHBE-TS-SHEET 5.

No. 865,779. PATENTED SEPT. 10, 1907.

0. HBSSER.

vMACHIN'L." FOR MAKING PAPER BAGS. APPLICATION FILED sBPT.2z.19o5.

BSHBETS-SHBET 6.

PATENTED SEPT. 10, 1907.

0. BESSER.

MACHINE FOR MAKING PAPER BAGS.

APPLICATION FILED SEPT. 22, 1905.

8 SHEETS-SHEET 7.

Il M PATENTED SEPT. lO, 1907. 0. BESSER.

MACHINE FOR MAKING PAPER BAGS. APPLIoATIoN FILED sEPT.2z.19o5.

8 SHEETS-SHEET B.

' view of the same.

. UNITED STATES PATENT. OFFICE. Y

OTTO n EssER, OF oANNsTATT, GERMANY.

MACHINE FOR MAKING PAPER BAGS.

To all whom it may concern:

Be it known that I, OTTO Hassan, a citizen of the German Empire',residing at Cannstatt, in the Kingdom of Wrtemberg, Germany, haveinvented certain new and useful Improvements in Machines for MakingPaper Bags, of which the following is a description, reference being hadto the accompanying drawing, and lto the letters and figures ofreference marked thereon.

This invention relates to paper bag machines, and has for its principalobject to properly feed and assemble outer andhlining sheets for themanufacture of lined paper bags.

A further object of the invention is to provide means whereby one of thesheets is supplied with gum or paste at the beginning of .the feedingoperation, and

thereby caused to adhere to the gum-applying member, which latter alsoserves as a sheet-raising and feeding member.

Further objects of the invention are to prevent the feeding of more thana single sheet at each movement of the feeding devices; to properly gripand convey the sheets, and to` properly position the sheets with respectto each other.

With these and other objects in view, the invention consists'in thecombination of elements described in the accompanying specification, andreferred to in the appended claims. i

ln the accompanying drawings: Figure 1 is an end elevation of asheet-feeding [machine constructed in accordance with the invention, oneof the main shafts being shown in section; Fig. 2 is a sectionalelevation of that portion of the mechanism employed for lifting theouter sheets; Fig. 3 is a plan view of the parts s hown in Figs. 1 and2; Fig. 4 is a detail sectional view, on an (enlarged scale, of thestripper fingers for preventing the feeding of more'than a single sheet;Fig. 5 isa plan Fig. 6 is a vertical sectional view of the completefeeding machine; Fig. 7 is a transverse sectional view of a portion ofthe same, showing the stop fingers for the outer shaft; Fig. 8 is a planview of a portion of the table, showing the location of the stopfingers; Fig. 9 is avertical sectional view of aportion of the table,showing the stops for preventing rearward movement of .the outer sheets;Fig. 10 is a plan view of the same; Fig. 11 is a side elevation of thatportion of the machine which includes the mechanismv for feeding theinner or lining sheets; Fig. l2 is a vertical sectional' view of aportion of the same; 13'is a plan view of the mechanism shown in Figli'v andv12; Fig. 14 is an elevation, on an enlargedl scale; showing thelocation of the strippers which act on the front edges of the liningsheets; Fig. 15 is a plan view of the same; Fig. 16 is a verticalsection illustrating the. construction 'Specification of Letters Patent.

Application filed September 22, 1905. Serial No. 279,746.

Patented Sept. 10,- 1907.

^ and arrangement ofthe suction lifter, which acts on the rear`edges ofthe lining sheets; Fig.'17 is a front elevation of the same; Fig.. 18 isa side'elevation of a portion of the lining sheet feeding devices,showing a modified form of sheet retaining finger; Fig. 19 is a verticalsectionall view of the same, on an enlarged scale; Fig. 2() is avertical section of the lining sheet feeding devices, on an enlargedscale; Figs. 2l and 22 are similar views, illustrating different stagesof the operation; Fig. 23 is an elevation, showing the lifting andconveying mechanism for the lining sheets; Fig.

'24 is a plan viw of the conveying mechanism shown in Fig. 23; Fig. 25illustrates on an enlarged scale, the construction of the sheet grippersof the conveying mechanism; Fig. 26 is a front elevation of the same;l

Fig. 27 is a front elevation of the movable stop and clamp for holdingboth sheets on the table; Fig. 28 is 'a plan view of a portion of thesame; Fig. 29 is a vertical section on an enlarged scale, of the tableand the stop and clamp devices; Fig. 30 is a plan view showingtheconveyer and guides for the outer or main sheet; Fig. 31 is anelevation of the clamping ngers for holding the edges of the outer sheetimmediately after they are raised from the pile; Fig. 32 is a similarview, on an enlarged scale, of one of the clamping fingers; Fig. 33 is aplan view of the complete feeding mechanism; and Fig. 34 shows theassembled sheets in plan, side and edge view.

Similar numerals of reference are employed to indicate correspondingparts throughout the several figures ofthe drawings. I

The main frame comprises two sections, of which the lower section l isprovided with bearings forv the support of the main cam shafts, whilethe upper section 2 supports the various working parts of the machine.

. At one end' ofthe machine is arranged a support for the vouter sheets3, and at one side is a support for the lining sheets 62, and thefunction of the machine is to raise and deliver one of the outer sheets,supplying the Eupper surface thereof with an adhesive, and then to placeone of the lining sheetson top of such outer sheets, after which theunited sheets are moved to the folding mechanism. The pile of sheets 3is arranged on a suitable support, which receives a short step by stepupward movement to compensate for the removal of suc- Projectingupwardly from the framel 2 is a vertical frame 1. The carri actuates arod 22, that is connected to one arm of a lever 24, fulcrumed on a pin23 on frame 2. and the opposite arm of thelever is connected by a linkto the carriage 19.

The carriage 19 is provided with a forwardly extending horizontal arm17, on which a slidably mounted carriage 6 is supported, and to one faceof said carriage is secured a vertically grooved block 6, which receivesa slide block 16, and in the block fits a pin 16, that projects from thelower end of a rocker arm 15, secured to a rock shaft 14.

The shaft 14 is mounted in suitable bearings in the frame 2, and carriesat one end a rocker arm 13, that is connected by a helical tensionspring 18, to a fixed point on the frame. The rocker arm 13 is connectedby a link 12 to one arm of a lever 1J, that is fulcrumed on a stud 9,carried by a frame bracket 10, and the opposite arm of said lever isactuated by a cam that is mounted bn a transversely disposed shaft 8,supported in bearings in the lower frame 1, and connected to shaft 34 bymiter gears. It is clear that rocking movement imparted to the shaft 14vwill traverse the pin 16 in the slotted bar` 6, and effect reciprocatorymovement of the carriage 6 on its supporting arm 17. A

The carriage 6 has a depending arm 5, to which is secured agum-applyingand sheet-lifting stop 4, the latter being traversed overthe gumming roller 7, and then descending into engagement with andraising the top sheet from the pile 3. The extent of downward movementis limited by a stop rod 26, that isadjustably secured to a bracketprojecting-from the vertically movable carriage 19.

As successive sheets are removed fromdhe pile, it is necessary to raisethe support of the latter and for `this purpose the support is providedwith a rack 29, engaged by a gear 28 on a shaft 29". On this shaft issecured a ratchet wheel 27, thatis engaged by a pawl 27, operated by abell crank lever 27h, and a rod 27 from the lever 24.

Thestrip 4 presses with some force on the u'ppermost sheet, andwhen-raised carries the sheet with it. ln many cases'one or two sheetswill cling to the one being raised, and will move upward with it, and toprevent the'delivery of more than a single sheet at each operation, aplurality of stripper fingers 30 are employed,

these being adjustably secured to the upper portion of the guide box orstrips, and serving to engage with the edges of all thesheets raised andprevent the passage of all except the sheetwhich is clinging to thegnmming l strip 4.

The forward, gummed edge of the sheet is raised slightly above the lowersurface of the plate 2, and while the sheet isheld in this position, itsopposite side edges are engaged by clamping fingers 32, that are pivotedon pins 33 at the'rear edge of plate 2, and are `clamped against thelower face of said plate.

The clamping fingers 32 are moved to open or release position by cams c,c, on shafts 34, 35, which transmits motion to the fingersthrough rods36 and said rods are engaged by clamp-closing springs 36,, extendingbetween collars on the rods, and the fixed frame 1, as shown in Fig.l31.

At apoint in advance of the plate 2is a table 38, in

` the upper surface 'of which are Vformed dove-tailed grooves yfor thereception of two parallel bars 31, the

outer'ends of which carry a sheet feeding plate 39 (Fig. 30) that movesunder the elevated front edge of the sheet raised by the gumming strip4,until the feeding lingers 40 at the rear edge of the plate are slightlybeyond the rear edge of the sheet, the latter resting thereon inreadiness to be transferred to the table 38. -The bars 3l also carry apair of feed fingers 110 (Fig. 30) which, at a second movement, transferthe sheets from Athe table 38 to other conveying mechanism by which thesheets are fed to the folding devices.

The bars 31 have pendent brackets 319', which are connected by a link 44to one arm of a bell crank lever 43 that is pivoted on a stud 42,projecting from frame 2 (Fig. 6). The opposite arm of the bellcranklever is connected to a rod 41, whichreceives motion from al cam don the shaft 8. In order to stop the movement of the sheet at the properpoint on table 38, two stop fingers 45 are employed. These fingers arecarried by arms 46, that project from a yoke-like carrying bar 48, thedownturned ends of which are pivoted on pins 47, projecting from theopposite sides of the 'table 38 (Figs. 7 and 8). To one endA of bar '48is secured a rocker arm 50, that is connected to one end of a rod 49,receiving mo'tion from a cam e on the shaft 8. During the return o f thebars 3l and plate 39 for another sheet, there is some tendency to carryback the previously fed sheet. To prevent this, a pair of stops 109are'arranged to move through openings or recesses in the table 38, andengage the rear edge of the sheet. 'lhese stopsy are carried by arms127, supported by a cross bar 128. The bar 128 is mounted on pivotedarms 131 (Figs. 6, 9 and 10)'and said arms or one of them, is or areoperated by a cam o on shaft 8, through the medium of a rod 129. As thesheet moves forward on the plate 39, its opposite edges are engaged byfixed guides 51 and 51, which guide the sheet laterally to properposition. One edge of the sheet is also clamped to the table 38 by themechanism shown in Figs. 27, 28 and 29, but as this operates also on thelining sheet, its construction and op eration will be describedhereinafter.

The pile of inner or lining sheets 62 is mounted on a suitable support,which is also provided with lmeans for raising it gradually as thesheets are removed. This support is at one side o f the machine,immediately under two pneumatic lifting devices 53 and `72, which arearranged to engage near the opposite edges of the successively uppermostsheets.

The primary or initial lifting member for the lining sheet is in theform of a tube 53, shown in the present instance as of segmental form incross section, and pro- `vided with openings'in one of its flat faces.This tube has circular end portions that are mounted in bearing blocks55, movable vertically in guideways formed at the opposite sides of.aframe 52. The bearing blocks also carry a bar 116, that is parallel withthe tube, and disposed slightly in advance of the latter. This barcarries spaced bars or plates 115, curved to partly encircle the tube,and provided with a number of stripper plates or fingers 115, that arearranged in an arcuate series, and serve, as the tube revolves, toengage and remove all sheets, except the top one, so that if a number ofsheets cling together and move upward with vthe tube, all 4save the topsheet will be forced down onto the pile. A

` One end of the tube is closed, and is engaged by a to the perforatedside of the tube.

sisme pump 61, that is operated by a cam g, on the shaft 34,

the cam being properly timedto actuate the pump and exhaust the air fromthe tube, so that `the uppermost sheet will cling to that side of thetube in which the perforations 53 are formed.

In brackets 65 on frame 52 are bearings for the reception of a shaft 57.At one end of the shaft is pivoted a lever 58, the lower end of which isconnected by a link 59 to an arm projecting from the end of the tube 53.This lever is connected to the upper end ofa rod 56, the lower end ofwhich is actuated by a cam f, on the shaft 34, the tube being rockedthrough an arc of 90, or between the two positions shown in Figs. 20 and21.

To the opposite endsof the rock shaft 57 are secured arms 69 and 70,carrying links 71, to which the ends of the tube 52 and the bearingsare/hung. The arm 69 is connected-by a rod 68 to a suitable cam on shaft34, which effects vertical movement of the suctionlifting tube ,betweenthe positions shown in Figs. 2l and 22.

The operation of this mechanism as thus far described, is as follows:With the tube 52 in the position shown in Fig. 20, the air is4 exhaustedby pump 6l, so that the uppermost of the pile of sheets 62 will clingThe mbe is then turned, by operating Aarm 58, tothe position shown inFig. 21. This operation will usually result` in raising the edges of twoor more sheets, and as these sheets pass the strippers 115', they areseparated from the topmost sheet and fall toward the pile, the movementbeing rendered certain by one or more retaining fingers 63, carried by arock shaft 64, adapted to bearings in the brackets 65. This shaftcarries at one end a rocker arm, which receives motion from a cam h onshaft 34, through the medium of a rod 66. The rock shaft 57 is thenturned, and the tube'52, and its bearings 55 are raised by links 71,tothe position shown in Fig. 22. The opposite or front edge ofthe sheetis operated upon bysuctionlifting heads 72, that arejcarried by a'tube73. Each of these heads has its lower face inclined from the-sidestoward the center'to form a contact surface of reduced area, while theopenings in the heads are on that side nearest the edge of the sheet,sothat the edge willV be turned up slightly, as shown in Fig. The tube73 issupported -by an arm projecting from a vertically slidable carriage84, that is guided on a vertical arm 85, carried by the frame (Figs. l1and 121 To the upper end of the carriage is connected a link 83, hungfrom one arm of a lever 82, that is fulcrumed on a pin 81, carried bythe frame. The opposite arm of this lever is connected by a rodl 80, toa bell crank lever 79,' fulcrurned on a stud 78, and the bell cranklever receives motion from a cam yl on shaft 8,I

As the suction heads 72 rise, they carry with them the l outer edge ofthe upper sheet, and in many casesone or two other sheets will also beraised. In order to prevent the delivery of more than a single sheet,the side bars of the paper guide are provided with stripper fingers 76,which engage with the edges of all of the raised sheets and separatethose clinging to the topmost sheet. The raising of the front edge ofthe sheet is accomplished as the rear edge is elevated by the suctionlift tube 52, so that the sheet is moved up to the position shown inFig. 22 in readiness to be conveyed to a position over the outer sheetpreviously placed' on the table Ata point to one side of the table 38 isa bracket 91, having a horizontally grooved guide 90, in which ismounted a slidable bar 89, disposed in a horizontal plane slightly abovethe plane ofthe table 38, and carrying plate 39. This bar 89 isconnected by a link 94 to one arm of a lever 93, that is pivoted on astud 92. The lower arm of the lever is connected to a rod 133, extendingtransversely of the frame, and operated by a cam m on the shaft 34.

At the front end of bar 89 is secured a plate 124, which is projectedtoa position underthe edge of the raised ards 87, in which arejournaled/'two shafts 88 and 122 (Figs. 25 and 26). The shaft 88 carriesa torsion spring 118, and the shaft 122 carries a similar spring 121.vOne end of each spring is connected to one of the standards 87, andtends to turn the shaftto which it is connected.

The shaft 88 carries two gripper fingers 86 and 86, which moves from thefull line position of Figs. 25 and 26 to the dotted line position ofFig. 25, to clamp the edge of the raised sheet against the upper surfaceof the conveyer plate 124. The shaft 88 also carries a shoulderedlocking disk 119, which is engagedby a lockingpawl 123,v on shaft 122,the pawl holding the shaft with the grippers in theA open position shownin Fig. 25, against-the stress of spring 118. The outer end of the pawlis in the path of 'downward movement of the tube 73, and as the latterdescends from the position shown in Figs. 22 and 25, to lay the edge ofthe`raised sheet on the plate 124 the pawl will be tripped, the diskreleased, and the grippers will movedown upon the edge of the sheet ofpaper. The bar 89 is then moved t0 carry the sheet over the outer sheetpreviously placed in position, but in order to prevent the sliding ofsheet 62 on the gummed upper face of sheet 3, a pair of inclined liftinglugs 95 are employed to hold the sheet slightly elevated. When theconveying device nears the limit of its movement, a pin 126 on thegripper 86, engages a Xedstop125 on the table 38, and the grip pers areturned to release position, the shouldered disk 119 being also turned,and being automatically engaged by the pawl 123 so that the grippers arelocked in ropen position in readiness for the next forward movement. Itwill be observed onl reference to Fig. 22that should a second sheet beraised with the tbp sheet,it

isheet, as shown in Fig. 22.v The plate 124 carries standlll() this, andat .the same time to hold the sheets in adjusted position during thereturn of the carrying plate 39', a clamping mechanism o the type shownin Figs. 6, 27, 28 and 29 is employed.

At one side of the table 38 is a vertical standard 97, in.

frame, and is connected to the upper arm ofl a rod 101,

the lower end of which is connected to one armof a bell crank lever 100,fulcrumed on astud- 99, projecting from aA bracket on frame' 1.Thefopposite arm ofL the bell crank lever is actuated from a cam n onshaft 8,'I

through the medium of aconnecting rod 98.

The clamp.- 96 is elevated during the movement off one of the'outersheets onto the table 38, andas soon as the sheet stops, the clampdescends and holds it in. place, the front .face of the clamp thenforming astop for limiting the movement of the lining sheet transverselyofthe table. guide-for a lining sheet clamp- 106; having curved fingersat its lower end to guide `the sheet downward, This clamp 106' isprovided with a horizontally elongated slotwhich also receives thepin"104, to permit the travel of` the pin in its arcuateupath. Theconstruction is such that while clamp 96 may descend to hold the outersheet, clampg106 may be kept elevated until the lining sheet is fed, andthenv allowed to move down to clamp said lining sheet, and 4hold. thesame during the return movement of the plate 39.

ln Figs. 18 and 19 is illustrated a modification of the sheet-retainingfinger 63. In this-construction, one or more tubes 112 are carried by ahollow shaft 114, one end of which'is connectedby a flexible tube 132 tothe air pump 61, a suitable cock 113 being interposed in theconnection.' The shaft may be rocked to allow\ the tubes to act asretaining fingers, and at the same time jets of air may be directedthrough' the'tubes to separate accidentally raised sheets from thesheetclinging to the suction lift tube 52.

Briefly described, the operation ofl the machine is as follows: Theuppermost sheet of the pile 3, is engaged by the gummi'ng strip 4, andthe sheet adheres to and is elevated by the strip as the latter movesup, while any lower sheets which may cling to the topmost will beengaged and removed by the strippers 30. When. the sheet engages thelower face of the plate 2,

itsopposite edges near the gummed surface are caughtand held by thefingers 32, while the strip 4 continues its upward movement and leavesthe sheet. The plate 39 carried by bars 31 then moves under the sheetand as it returns, carries the sheet over table 38 until the forwardedge of the sheet engages the stops 45, the sheet being guided laterallyby the strips 51 and.51, after which the clamp 96 descends and holds init place. In the meantime, the outer edge of one ofthe sheets 62.hasbeen turned up by the suction lift tube 52, 'any adhering lower sheetsbeing removed by the strippers 115, and then retained by the `fingers63. The tube 52 then carries the sheet upward a short dis-- greaterdistance, by the suction heads 72. The sheet is The bracket= 97 alsoserves `as a.

, table.

saam

raised above the plate 124, and as the tube 73 moves down the `edge ofthe sheet drops on the plate, and the tube engages and trips the pawl123, anddisk 119, whereupon the grippers 86 and 86 descend and clamp thesheet against the plate. As the plate and grippers move back the sheetis carried over the lugs 95, and held above the gummed sheet 3previously placed on the table 38. The clamp 96 acts as a stop forlimiting movement of the sheet 6 2, and then clamp 106 descends to holdthe sheet in place. The stops 109 then move up to engage the edges ofthe sheets, after which plate 39 returns forla second sheet. As theplate 39 and bars 31- again move forward, the fingers 110 on bars 31engage the two sheets and feed them to a suitable conveying mechanism,such for instance as the rollers 111.

Having thus described my invention, what I claim as new and desire tosecure by Letters.Patent, is:-

1. In a paper feeding machine, the combination with means for supportinga pile of sheets of paper, of a gum reservoir, a gum-applying strip,means for moving said strip between the reservoir and the successiveuppermost sheets of the pile to successively raise-said sheets, and avclamping means for engaging and holding the sheets near the gummed edgebefore the completion of the upward movement of said strip.

2. In a paper feeding machine, the combination with means for supportinga pile of sheets of paper, of a gum reservoir, a gum-applying strip,means for moving the same between the reservoir and the successiveuppermost sheets of the pile, a plate against which the sheets engageduring their upward movement, clamping lingers for forcing the sheetagainst -the plate in advance of the completion of the upward movementofthe strip,and means for operating said clamping fingers.

3. In a paper feeding device, the combination with means for supportinga pile of sheets of paper, of a gum reservoir, a gum-applylng member, ahorizontally movable carriage supporting said member, means forreciprocating said carriage, a'vertcally movable carriage having an armby which the horizontally movable carriage is guided, means for movingthe vertically movable carriagefand means for engaging and holding thesheets of paper in ad- Vance of the completion of the upward movement ofthe strip. Y

4r In a paper feeder, gum applying member for engaging and raising thesuccessive uppermost sheets of a pile,

tion of the upward movement of the gum applying member -to permit theseparation of the latterl from the sheetA after the latter is fullyraised, a conveyer plate movable under the partly raised sheets, andmeans for operating said conveyer plate. 4

5. In a paper feedingv machine, means-for supporting a pile of sheets ofpaper, a table having stops against which the sheets are to be'fed, aconveyer plate, bars carrying the plate and slidable in grooves formedin the upper portion of the table, means for actuating said plate andbars,

movable between the reservoir and the successive uppermost sheets of apile, and means for clamping and holding the raised sheets in positionto permit the separation of the gum applying member from the sheets andthe passage of a conveyer plate beneath them.

6.1'1n a paper feeding machine, aY table, means for supporting a pile ofouter sheets and a pile of lining sheets, means for applying gum to theouter sheets, and for feeding the sheets successively to a position onthe table, means for raising and conveying the successively uppermostlining sheets to a position over the previously placed outer sheets, andindependent and successively operable means for holding said sheets inadjusted position n the l. In a paper feeding machine, means forsupporting a pile of outer sheets` and a pile of lining sheets, meansfor applying gum to the successively uppermost outer sheets, and forraisingand conveying the same to position on the `a gum reservoir, agum-applying and sheet-raising member table, a clamping member forholding the sheet in position on the table, means for raising andconveying` the successively uppermost lining sheets to a position overlthe outer sheet and against said clamp, the latter serving as a guidefor positioning the lining sheet.

A8. In a paper feeding machine, a table, means for gum' 10 movement ofsaid outer` sheets, and inclined blocks over which the sheets are fed,said blocks serving as lifters to hold the lining sheets elevated untilin position with respect to said outer sheets.

In testimony whereof I ax my signature, in presence of two witnesses.

OTTO HESSER.

Witnesses WALTER ScHWAEnscn, WILLY HEINRICH.

